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<div class="header">
  <div class="headertitle"><div class="title">MC146818.cpp</div></div>
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<div class="contents">
<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/*</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment">  Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - &lt;http://www.fabgl.com&gt;</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment">  Copyright (c) 2019-2022 Fabrizio Di Vittorio.</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment">  All rights reserved.</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"></span> </div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"></span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment">* Please contact fdivitto2013@gmail.com if you need a commercial license.</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"></span> </div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"></span> </div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment">* This library and related software is available under GPL v3.</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"></span> </div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment">  FabGL is free software: you can redistribute it and/or modify</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment">  it under the terms of the GNU General Public License as published by</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment">  the Free Software Foundation, either version 3 of the License, or</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment">  (at your option) any later version.</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"></span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment">  FabGL is distributed in the hope that it will be useful,</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">  but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment">  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="comment">  GNU General Public License for more details.</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="comment"></span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="comment">  You should have received a copy of the GNU General Public License</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="comment">  along with FabGL.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="comment"> */</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span> </div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span> </div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span><span class="preprocessor">#include &quot;MC146818.h&quot;</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span> </div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span> </div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span><span class="preprocessor">#define NSVKEY_REGS   &quot;MC146818&quot;</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span> </div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span> </div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span><span class="comment">// MC146818 registers</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span><span class="preprocessor">#define REG_SECONDS       0x00    </span><span class="comment">// bin: 0..59, bcd: 00..59</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span><span class="preprocessor">#define REG_SECONDS_ALARM 0x01    </span><span class="comment">// like REG_SECONDS or &gt;=0xc0 for don&#39;t care</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span><span class="preprocessor">#define REG_MINUTES       0x02    </span><span class="comment">// bin: 0..59, bcd: 00..59</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span><span class="preprocessor">#define REG_MINUTES_ALARM 0x03    </span><span class="comment">// like REG_MINUTES or &gt;=0xc0 for don&#39;t care</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span><span class="preprocessor">#define REG_HOURS         0x04    </span><span class="comment">// bin: 1..12 or 0..23, bcd: 01..12 or 00..23 (ORed with 0x80 for PM when range is 1..12)</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span><span class="preprocessor">#define REG_HOURS_ALARM   0x05    </span><span class="comment">// like REG_HOURS or &gt;=0xc0 for don&#39;t care</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span><span class="preprocessor">#define REG_DAYOFWEEK     0x06    </span><span class="comment">// bin: 1..7, bcd: 01..07, (sunday = 1)</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span><span class="preprocessor">#define REG_DAYOFMONTH    0x07    </span><span class="comment">// bin: 1..31, bcd: 01..31</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span><span class="preprocessor">#define REG_MONTH         0x08    </span><span class="comment">// bin: 1..12, bcd: 01..12</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span><span class="preprocessor">#define REG_YEAR          0x09    </span><span class="comment">// bin: 0..99, bcd: 00..99</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span><span class="comment">// not MC146818 but anyway filled (to avoid Y2K bug)</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span><span class="preprocessor">#define REG_CENTURY       0x32    </span><span class="comment">// bcd: 19 or 20</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span> </div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span><span class="comment">// status and control registers</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span><span class="preprocessor">#define REG_A             0x0a</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span><span class="preprocessor">#define REG_B             0x0b</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span><span class="preprocessor">#define REG_C             0x0c</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span><span class="preprocessor">#define REG_D             0x0d</span></div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span> </div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span><span class="comment">// bits of register A</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span><span class="preprocessor">#define REGA_RS0          0x01  </span><span class="comment">// R/W, rate selection for square wave gen and Periodic Interrupt</span></div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span><span class="preprocessor">#define REGA_RS1          0x02  </span><span class="comment">// R/W</span></div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span><span class="preprocessor">#define REGA_RS2          0x04  </span><span class="comment">// R/W</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span><span class="preprocessor">#define REGA_RS3          0x08  </span><span class="comment">// R/W</span></div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span><span class="preprocessor">#define REGA_DV0          0x10  </span><span class="comment">// R/W, input freq divider</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span><span class="preprocessor">#define REGA_DV1          0x20  </span><span class="comment">// R/W</span></div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span><span class="preprocessor">#define REGA_DV2          0x40  </span><span class="comment">// R/W</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span><span class="preprocessor">#define REGA_UIP          0x80  </span><span class="comment">// R/O, 1 = update in progress</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span> </div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span><span class="comment">// bits of register B</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span><span class="preprocessor">#define REGB_DSE          0x01  </span><span class="comment">// R/W, 1 = enabled daylight save</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span><span class="preprocessor">#define REGB_H24          0x02  </span><span class="comment">// R/W, 1 = 24h mode, 0 = 12h mode</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span><span class="preprocessor">#define REGB_DM           0x04  </span><span class="comment">// R/W, 1 = binary format, 0 = BCD format</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span><span class="preprocessor">#define REGB_SQWE         0x08  </span><span class="comment">// R/W, 1 = enable SQWE output</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span><span class="preprocessor">#define REGB_UIE          0x10  </span><span class="comment">// R/W, 1 = enable update ended interrupt</span></div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span><span class="preprocessor">#define REGB_AIE          0x20  </span><span class="comment">// R/W, 1 = enable alarm interrupt</span></div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span><span class="preprocessor">#define REGB_PIE          0x40  </span><span class="comment">// R/W, 1 = enable period interrupts</span></div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span><span class="preprocessor">#define REGB_SET          0x80  </span><span class="comment">// R/W, 1 = halt time updates</span></div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span> </div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span><span class="comment">// bits of register C</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span><span class="preprocessor">#define REGC_UF           0x10  </span><span class="comment">// R/O, 1 = update ended interrupt flag</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span><span class="preprocessor">#define REGC_AF           0x20  </span><span class="comment">// R/O, 1 = alarm interrupt flag</span></div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span><span class="preprocessor">#define REGC_PF           0x40  </span><span class="comment">// R/O, 1 = period interrupt flag</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span><span class="preprocessor">#define REGC_IRQF         0x80  </span><span class="comment">// R/O, this is &quot;UF &amp; UIE | AF &amp; AIE | PF &amp; PIE&quot;</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span> </div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span><span class="comment">// bits of register D</span></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span><span class="preprocessor">#define REGD_VRT          0x80  </span><span class="comment">// R/O, 1 = valid RAM and time</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span> </div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span> </div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span> </div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span><span class="keyword">namespace </span>fabgl {</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span> </div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span> </div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span>MC146818::MC146818()</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>  : m_nvs(0),</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>    m_interruptCallback(nullptr),</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>    m_periodicIntTimerHandle(nullptr),</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span>    m_endUpdateIntTimerHandle(nullptr)</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>{</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>}</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span> </div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span> </div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span>MC146818::~MC146818()</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span>{</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>  stopPeriodicTimer();</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span>  stopEndUpdateTimer();</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>  <span class="keywordflow">if</span> (m_nvs)</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>    nvs_close(m_nvs);</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span>}</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span> </div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span> </div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span><span class="keywordtype">void</span> MC146818::init(<span class="keywordtype">char</span> <span class="keyword">const</span> * NVSNameSpace)</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span>{</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>  <span class="comment">// load registers from NVS</span></div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>  <span class="keywordflow">if</span> (!m_nvs) {</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span>    esp_err_t err = nvs_flash_init();</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>    <span class="keywordflow">if</span> (err == ESP_ERR_NVS_NO_FREE_PAGES || err == ESP_ERR_NVS_NEW_VERSION_FOUND) {</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>      nvs_flash_erase();</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span>      nvs_flash_init();</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span>    }</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>    nvs_open(NVSNameSpace, NVS_READWRITE, &amp;m_nvs);</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span>  }</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>  <span class="keywordflow">if</span> (m_nvs) {</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>    <span class="keywordtype">size_t</span> len = <span class="keyword">sizeof</span>(m_regs);</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>    <span class="keywordflow">if</span> (nvs_get_blob(m_nvs, NSVKEY_REGS, m_regs, &amp;len) != ESP_OK) {</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>      <span class="comment">// first time initialization</span></div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>      memset(m_regs, 0, <span class="keyword">sizeof</span>(m_regs));</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span>    }</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>  }</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span>}</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span> </div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span> </div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span><span class="comment">// reload data from NVS</span></div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span><span class="keywordtype">void</span> MC146818::reset()</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span>{</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span>  <span class="comment">// set registers bits affected by reset</span></div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>  m_regs[REG_B] &amp;= ~(REGB_PIE | REGB_AIE | REGB_UIE | REGB_SQWE);</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span>  m_regs[REG_C] &amp;= ~(REGC_IRQF | REGC_PF | REGC_AF | REGC_UF);</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span>  m_regs[REG_D]  = REGD_VRT; <span class="comment">// power ok</span></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span> </div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span>  m_regSel = 0;</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span>}</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span> </div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span> </div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span><span class="comment">// saves all data to NVS</span></div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span><span class="keywordtype">void</span> MC146818::commit()</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span>{</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>  <span class="keywordflow">if</span> (m_nvs) {</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span>    nvs_set_blob(m_nvs, NSVKEY_REGS, m_regs, <span class="keyword">sizeof</span>(m_regs));</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span>  }</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>}</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span> </div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span> </div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span><span class="comment">// address:</span></div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span><span class="comment">//    1 : register read</span></div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span>uint8_t MC146818::read(<span class="keywordtype">int</span> address)</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span>{</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span>  uint8_t retval = 0;</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span>  <span class="keywordflow">if</span> (address == 1) {</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span>    <span class="keywordflow">if</span> (m_regSel &lt;= REG_YEAR || m_regSel == REG_CENTURY)</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span>      updateTime();</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span>    retval = m_regs[m_regSel];</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span>    <span class="keywordflow">if</span> (m_regSel == REG_C) {</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span>      <span class="comment">// timers are enabled when flags are read</span></div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span>      enableTimers();</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span>      <span class="comment">// flags are cleared on read (but after retval has been assigned!)</span></div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span>      m_regs[REG_C] = 0;</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span>    }</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span>    <span class="comment">//printf(&quot;MC146818::read(%02X) =&gt; %02X (sel=%02X)\n&quot;, address, retval, m_regSel);</span></div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span>  }</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span>  <span class="keywordflow">return</span> retval;</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>}</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span> </div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span> </div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span><span class="comment">// address:</span></div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span><span class="comment">//    0 : register address port (bits 0-6)</span></div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span><span class="comment">//    1 : register write</span></div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span><span class="keywordtype">void</span> MC146818::write(<span class="keywordtype">int</span> address, uint8_t value)</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span>{</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span>  <span class="keywordflow">switch</span> (address) {</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span>    <span class="keywordflow">case</span> 0:</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span>      m_regSel = value &amp; 0x7f;</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span>      <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span>    <span class="keywordflow">case</span> 1:</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span>      m_regs[m_regSel] = value;</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span>      <span class="keywordflow">if</span> ( (m_regSel == REG_A &amp;&amp; (value &amp; 0xf) != 0) ||</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span>           (m_regSel == REG_B &amp;&amp; (value &amp; (REGB_UIE | REGB_AIE | REGB_PIE)) != 0) ) {</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span>        <span class="comment">// timers are enabled when Rate Selection &gt; 0 or any interrupt is enabled</span></div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span>        enableTimers();</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span>      }</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span>      <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span>  }</div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span>}</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span> </div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span> </div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span><span class="comment">// convert decimal to packed BCD (v in range 0..99)</span></div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span><span class="keyword">static</span> uint8_t byteToBCD(uint8_t v)</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span>{</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span>  <span class="keywordflow">return</span> (v % 10) | ((v / 10) &lt;&lt; 4);</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span>}</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span> </div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span> </div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span><span class="comment">// get time from system and fill date/time registers</span></div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span><span class="keywordtype">void</span> MC146818::updateTime()</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span>{</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span>  <span class="keywordflow">if</span> ((m_regs[REG_B] &amp; REGB_SET) == 0) {</div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span> </div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span>    time_t now;</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>    tm timeinfo;</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span> </div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span>    time(&amp;now);</div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span>    localtime_r(&amp;now, &amp;timeinfo);</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span> </div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span>    <span class="keywordtype">bool</span> binary = m_regs[REG_B] &amp; REGB_DM;</div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span>    <span class="keywordtype">bool</span> h24    = m_regs[REG_B] &amp; REGB_H24;</div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span> </div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span>    <span class="keywordtype">int</span> year    = (1900 + timeinfo.tm_year);  <span class="comment">// 1986, 2021, ...</span></div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span>    <span class="keywordtype">int</span> century = year / 100;                 <span class="comment">// 19, 20, ...</span></div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span> </div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span>    m_regs[REG_CENTURY] = byteToBCD(century);</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span> </div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span>    <span class="keywordflow">if</span> (binary) {</div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span>      <span class="comment">// binary format</span></div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span>      m_regs[REG_SECONDS]    = imin(timeinfo.tm_sec, 59);</div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span>      m_regs[REG_MINUTES]    = timeinfo.tm_min;</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span>      m_regs[REG_HOURS]      = h24 ? timeinfo.tm_hour : (((timeinfo.tm_hour - 1) % 12 + 1) | (timeinfo.tm_hour &gt;= 12 ? 0x80 : 0x00));</div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span>      m_regs[REG_DAYOFWEEK]  = timeinfo.tm_wday + 1;</div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span>      m_regs[REG_DAYOFMONTH] = timeinfo.tm_mday;</div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span>      m_regs[REG_MONTH]      = timeinfo.tm_mon + 1;</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span>      m_regs[REG_YEAR]       = year - century * 100;</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span>    } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span>      <span class="comment">// BCD format</span></div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span>      m_regs[REG_SECONDS]    = byteToBCD(imin(timeinfo.tm_sec, 59));</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span>      m_regs[REG_MINUTES]    = byteToBCD(timeinfo.tm_min);</div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span>      m_regs[REG_HOURS]      = h24 ? byteToBCD(timeinfo.tm_hour) : (byteToBCD((timeinfo.tm_hour - 1) % 12 + 1) | (timeinfo.tm_hour &gt;= 12 ? 0x80 : 0x00));</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno">  231</span>      m_regs[REG_DAYOFWEEK]  = byteToBCD(timeinfo.tm_wday + 1);</div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span>      m_regs[REG_DAYOFMONTH] = byteToBCD(timeinfo.tm_mday);</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span>      m_regs[REG_MONTH]      = byteToBCD(timeinfo.tm_mon + 1);</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span>      m_regs[REG_YEAR]       = byteToBCD(year - century * 100);</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span>    }</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno">  236</span>  }</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span>}</div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span> </div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span> </div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span><span class="keywordtype">void</span> MC146818::enableTimers()</div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno">  241</span>{</div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span>  esp_timer_init(); <span class="comment">// can be called multiple times</span></div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span> </div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno">  244</span>  <span class="comment">// Setup Periodic Interrupt timer</span></div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno">  245</span>  stopPeriodicTimer();</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno">  246</span>  <span class="keywordtype">int</span> rate = m_regs[REG_A] &amp; 0xf;</div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno">  247</span>  <span class="keywordflow">if</span> (rate &gt; 0) {</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno">  248</span>    <span class="comment">// supported divider (time base)?</span></div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno">  249</span>    <span class="keywordtype">int</span> divider = (m_regs[REG_A] &gt;&gt; 4) &amp; 7;</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno">  250</span>    <span class="keywordflow">if</span> (divider == 2) {</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno">  251</span>      <span class="comment">// we just support 32768Hz time base</span></div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno">  252</span>      <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> RATE2US[16] = { 0, 3906, 7812, 122, 244, 488, 976, 1953, 3906, 7812, 15625, 31250, 62500, 125000, 250000, 500000 };</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno">  253</span>      esp_timer_create_args_t args = { };</div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno">  254</span>      args.callback = periodIntTimerFunc;</div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno">  255</span>      args.arg = <span class="keyword">this</span>;</div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno">  256</span>      args.dispatch_method = ESP_TIMER_TASK;</div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno">  257</span>      esp_timer_create(&amp;args, &amp;m_periodicIntTimerHandle);</div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno">  258</span>      esp_timer_start_periodic(m_periodicIntTimerHandle, RATE2US[rate]);</div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno">  259</span>      <span class="comment">//printf(&quot;MC146818: Periodic timer started\n&quot;);</span></div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno">  260</span>    } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno">  261</span>      printf(<span class="stringliteral">&quot;MC146818: Unsupported freq divider %d\n&quot;</span>, divider);</div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno">  262</span>    }</div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno">  263</span>  }</div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno">  264</span> </div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno">  265</span>  <span class="comment">// Setup Alarm and End of Update timer</span></div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno">  266</span>  <span class="keywordflow">if</span> (!m_endUpdateIntTimerHandle) {</div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno">  267</span>    esp_timer_create_args_t args = { };</div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno">  268</span>    args.callback = endUpdateIntTimerFunc;</div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno">  269</span>    args.arg = <span class="keyword">this</span>;</div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno">  270</span>    args.dispatch_method = ESP_TIMER_TASK;</div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno">  271</span>    esp_timer_create(&amp;args, &amp;m_endUpdateIntTimerHandle);</div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno">  272</span>    esp_timer_start_periodic(m_endUpdateIntTimerHandle, 1000000); <span class="comment">// 1 second</span></div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno">  273</span>    <span class="comment">//printf(&quot;MC146818: Alarm &amp; End of Update timer started\n&quot;);</span></div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno">  274</span>  }</div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno">  275</span>}</div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno">  276</span> </div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno">  277</span> </div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno">  278</span><span class="keywordtype">void</span> MC146818::stopPeriodicTimer()</div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno">  279</span>{</div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno">  280</span>  <span class="keywordflow">if</span> (m_periodicIntTimerHandle) {</div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno">  281</span>    esp_timer_stop(m_periodicIntTimerHandle);</div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno">  282</span>    esp_timer_delete(m_periodicIntTimerHandle);</div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno">  283</span>    m_periodicIntTimerHandle = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno">  284</span>  }</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno">  285</span>}</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno">  286</span> </div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno">  287</span> </div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno">  288</span><span class="keywordtype">void</span> MC146818::stopEndUpdateTimer()</div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno">  289</span>{</div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno">  290</span>  <span class="keywordflow">if</span> (m_endUpdateIntTimerHandle) {</div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno">  291</span>    esp_timer_stop(m_endUpdateIntTimerHandle);</div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno">  292</span>    esp_timer_delete(m_endUpdateIntTimerHandle);</div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno">  293</span>    m_endUpdateIntTimerHandle = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno">  294</span>  }</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno">  295</span>}</div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno">  296</span> </div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno">  297</span> </div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno">  298</span><span class="comment">// Handles Periodic events at specified rate</span></div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno">  299</span><span class="keywordtype">void</span> MC146818::periodIntTimerFunc(<span class="keywordtype">void</span> * args)</div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno">  300</span>{</div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno">  301</span>  <span class="keyword">auto</span> m = (MC146818 *) args;</div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno">  302</span> </div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno">  303</span>  <span class="comment">// set periodic flag</span></div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno">  304</span>  m-&gt;m_regs[REG_C] |= REGC_PF;</div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno">  305</span> </div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno">  306</span>  <span class="comment">// trig interrupt?</span></div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno">  307</span>  <span class="keywordflow">if</span> (m-&gt;m_regs[REG_B] &amp; REGB_PIE) {</div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno">  308</span>    m-&gt;m_regs[REG_C] |= REGC_PF | REGC_IRQF;</div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno">  309</span>    m-&gt;m_interruptCallback(m-&gt;m_context);</div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno">  310</span>  }</div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno">  311</span>}</div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno">  312</span> </div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno">  313</span> </div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno">  314</span><span class="comment">// Fired every second</span></div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno">  315</span><span class="comment">// Handles Alarm and End Update events</span></div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno">  316</span><span class="keywordtype">void</span> MC146818::endUpdateIntTimerFunc(<span class="keywordtype">void</span> * args)</div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno">  317</span>{</div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno">  318</span>  <span class="keyword">auto</span> m = (MC146818 *) args;</div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno">  319</span> </div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno">  320</span>  <span class="keywordflow">if</span> ((m-&gt;m_regs[REG_B] &amp; REGB_SET) == 0) {</div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno">  321</span> </div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno">  322</span>    <span class="comment">// updating flag</span></div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno">  323</span>    m-&gt;m_regs[REG_A] |= REGA_UIP;</div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno">  324</span> </div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno">  325</span>    m-&gt;updateTime();</div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno">  326</span> </div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno">  327</span>    <span class="comment">// alarm?</span></div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno">  328</span>    <span class="keywordflow">if</span> ( ((m-&gt;m_regs[REG_SECONDS_ALARM] &amp; 0xc0) == 0xc0 || (m-&gt;m_regs[REG_SECONDS_ALARM] == m-&gt;m_regs[REG_SECONDS])) &amp;&amp;</div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno">  329</span>         ((m-&gt;m_regs[REG_MINUTES_ALARM] &amp; 0xc0) == 0xc0 || (m-&gt;m_regs[REG_MINUTES_ALARM] == m-&gt;m_regs[REG_MINUTES])) &amp;&amp;</div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno">  330</span>         ((m-&gt;m_regs[REG_HOURS_ALARM] &amp; 0xc0) == 0xc0 || (m-&gt;m_regs[REG_HOURS_ALARM] == m-&gt;m_regs[REG_HOURS])) ) {</div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno">  331</span>      <span class="comment">// yes, set flag</span></div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno">  332</span>      m-&gt;m_regs[REG_C] |= REGC_AF;</div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno">  333</span>    }</div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno">  334</span> </div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno">  335</span>    <span class="comment">// always signal end update</span></div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno">  336</span>    m-&gt;m_regs[REG_C] |= REGC_UF;</div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno">  337</span> </div>
<div class="line"><a id="l00338" name="l00338"></a><span class="lineno">  338</span>    <span class="comment">// updating flag</span></div>
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno">  339</span>    m-&gt;m_regs[REG_A] &amp;= ~REGA_UIP;</div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno">  340</span> </div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno">  341</span>    <span class="comment">// trig interrupt?</span></div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno">  342</span>    <span class="keywordflow">if</span> ( ((m-&gt;m_regs[REG_B] &amp; REGB_UIE) &amp;&amp; (m-&gt;m_regs[REG_C] &amp; REGC_UF)) ||</div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno">  343</span>         ((m-&gt;m_regs[REG_B] &amp; REGB_AIE) &amp;&amp; (m-&gt;m_regs[REG_C] &amp; REGC_AF)) ) {</div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno">  344</span>      <span class="comment">// yes</span></div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno">  345</span>      m-&gt;m_regs[REG_C] |= REGC_IRQF;</div>
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno">  346</span>      m-&gt;m_interruptCallback(m-&gt;m_context);</div>
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno">  347</span>    }</div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno">  348</span> </div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno">  349</span>  }</div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno">  350</span>}</div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno">  351</span> </div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno">  352</span> </div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno">  353</span> </div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno">  354</span>}   <span class="comment">// fabgl namespace</span></div>
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